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<table width="100%" summary="page for polyps3"><tr><td>polyps3</td><td align="right">R Documentation</td></tr></table>

<h2> Familial Andenomatous Polyposis </h2>

<h3>Description</h3>


<p>Data from a placebo-controlled trial of a non-steroidal anti-inflammatory
drug in the treatment of familial andenomatous polyposis (FAP).
</p>


<h3>Usage</h3>

<pre>data("polyps3")</pre>


<h3>Format</h3>


<p>A data frame with 22 observations on the following 5 variables.
</p>

<dl>
<dt><code>sex</code></dt><dd><p>a factor with levels <code>female</code> and <code>male</code>.</p>
</dd>
<dt><code>treatment</code></dt><dd><p>a factor with levels <code>placebo</code> and <code>active</code>.</p>
</dd>
<dt><code>baseline</code></dt><dd><p>the baseline number of polyps.</p>
</dd>
<dt><code>age</code></dt><dd><p>the age of the patient.</p>
</dd>
<dt><code>number3m</code></dt><dd><p>the number of polyps after three month.</p>
</dd>
</dl>



<h3>Details</h3>


<p>The data arise from the same study as the <code>polyps</code> data. Here, 
the number of polyps after three months are given.
</p>


<h3>Source</h3>


<p>F. M. Giardiello, S. R. Hamilton, A. J. Krush, S. Piantadosi, L. M. Hylind,
P. Celano, S. V. Booker, C. R. Robinson and G. J. A. Offerhaus (1993),
Treatment of colonic and rectal adenomas with sulindac
in familial adenomatous polyposis. <EM>New England Journal of Medicine</EM>,
<B>328</B>(18), 1313&ndash;1316.
</p>
<p>S. Piantadosi (1997), <EM>Clinical Trials: A Methodologic Perspective</EM>.
John Wiley \&amp; Sons, New York.
</p>


<h3>Examples</h3>

<pre>

  data("polyps3", package = "HSAUR")
  plot(number3m ~ age, data = polyps3, pch = as.numeric(polyps3$treatment))
  legend("topright", legend = levels(polyps3$treatment), pch = 1:2, bty = "n")

</pre>


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